The future of laser projectors for projection screens-XY Screens-img

The future of laser projectors for projection screens

by:XY Screens     2021-09-06
Regardless of picture quality, laser transmitters have a longer life than traditional bulbs, are not fragile, and can be used immediately. With these in mind, laser will become the future of projection technology. The projector can bring the largest and most immersive picture to the user. Of course, you can buy a 70-inch TV right now, but at home, the projection screen can easily reach 100 inches or more. Compared with the TV, the impact is self-evident. The screen size is probably the main reason why people are willing to pay to go to the movies. 'Tomorrow' was released not long ago. It is the world’s first film made with Dolby Vision. In Dolby Cinema, the film’s unparalleled brightness and clarity, coupled with rich details, is presented with the help of laser projection technology. Before the audience. Goodbye, although the Xenon lamp sounds like the above-mentioned laser projection equipment is full of futuristic colors, in reality, laser projectors are not much different from traditional projectors. For the projector, the biggest task is to generate light, and then manipulate the light to form an image on the screen. For laser projectors, the biggest difference is that the devices that generate light are different. Essentially, the laser responsible for producing red, green, and blue light is in a 'defocus' state, filling the entire DLP, LCOS, or LCD chip without scanning the chip. From a certain point of view, 'laser projector' is the same as 'LED TVBoth terms are used to describe the technology of generating light, not the technology of creating images, but one is a laser, and the other is a light-emitting diode. In contrast, 'DLP projector' and 'LCD TV' are more accurate. Lasers are mainly used to replace UHP, Xenon lamps and other forms of light bulbs on traditional projectors. Does it sound a bit back to reality? But it's still cool. The three primary colors, regardless of whether the TV or the projector, use the three primary colors of red, green, and blue to create each color on the screen. The bulb of an ordinary projector produces white light, and the excess light is absorbed by the projector, leaving only the three primary colors of red, green and blue, and then project them onto the screen. Does this sound inefficient? The laser only creates the required colors, so energy consumption is lower. Imagine that if the power of a UHP bulb is 300 watts, among the white light sources it produces, only red, green and blue are used, and the remaining colors such as yellow, purple and cyan are filtered out, which will cause some waste. If 300 watts of power consumption are provided to three 100 watt lasers, theoretically they will produce higher brightness. Of course, it is actually not that simple, but the idea is correct. Now that the efficiency is improved, the laser projection system can produce a brighter picture. 'Tomorrowland' shown in Dolby Cinema feels like it is shown on some plasma TVs. Dolby claims that its screen brightness is 31fL, which is an amazing brightness in a dark space. If traditional Xenon lamps are to produce the same level of brightness, movie theaters need to provide a set of small power stations and a giant cooling system. What's more interesting is that the laser can generate light of any wavelength. In this way, there is no need to worry about brightness, and the device can produce a wider range of colors, which is closer to the limit that the human eye can recognize. The film 'Tomorrowland' uses the P3 color gamut, which is widely regarded as the standard for next-generation home theater systems. Dolby claims that their laser projection technology can handle the color gamut of Rec 2020, and the number is quite amazing. In addition, the laser projection equipment does not require a long waiting time for switching on and off. If you use a traditional model, it takes a long time to warm up and cool down after shutting down. This advantage can be reflected in the contrast, presenting more amazing details to the audience. Safety issues When it comes to lasers, people usually have several doubts. The first is safety. All users who use consumer-grade lasers know that they cannot irradiate their eyes. The lasers in projectors are much more powerful. Does this mean they are much more dangerous? The laser passes through the fluorescent wheel and the diffuser wheel, and meets the secondary safety standard. Like other projectors, it will not cause damage to the retina unless the user stares directly at the lens for a long time. In fact, when the light leaves the lens, it is no longer in a high-energy focused state, but it is still very bright. The FDA does have some requirements for theater projection equipment, because such equipment is classified as a 'laser light show' category. In addition, people are also worried about reflection problems, but this is usually not likely to happen, and researchers have developed materials that can eliminate this phenomenon. All in all, laser projectors can bring us a brighter picture and better color performance, but the current price is too high. In time, these devices will be able to enter the living room of ordinary users.
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